BT103S Variable-Speed Peristaltic Pump

As low as $378.00
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The BT103S peristaltic pump is driven by a high-quality stepper motor, with a speed range of 0.1 to 100 rpm and speed accuracy of ±0.2%. Its single-channel flow rate range is from 0.0001 to 480ml/min. The RS485 communication interface, compatible with Modbus protocol, can be connected to computers, microcontrollers, PLCs, inverters, HMIs and other external devices for systematic or centralized control.

Functions and Features

  • Membrane keypad operation, simple, convenient and durable.
  • High-quality closed-loop stepper motor drive, accurate speed and smooth operation, allowing for high-precision flow transmission.
  • Basic functions such as forward and reverse, start/stop, full speed, speed regulation, state memory (power-down memory).
  • Parameters include running time, interval time, number of cycles, etc. to meet the needs of timed dosing, liquid dispensing, and flow testing.
  • The slow stop and anti-drip function can effectively prevent liquid dripping when stopping.
  • Key lock function to prevent misoperation.
  • Streamlined plastic housing, easy to clean.
  • Circuit board with layered paint process for dust and moisture-proof.
  • Excellent anti-interference characteristics, wide voltage range, suitable for complex power supply environment.
  • A variety of external control signals can be used to control start/stop, forward/reverse rotation, speed adjustment, and optocoupler isolation.
  • RS485 communication, compatible with Modbus protocol, for convenient connection with various control devices.
  • Support blocking alarm, leakage alarm (optional).
  • A thermal printer can be connected for real-time printing of operating parameters (optional).
  • Can be connected with a variety of high-performance pump heads.



  • Flow rate: 0.0001 to 480ml/min
  • Speed range: 0.1 to 100rpm
  • Speed resolution: 0.1rpm
  • Speed Accuracy: 0.2%
  • Display : monochrome 128x32 dot matrix LCD, 77x32mm
  • Key lock: long press the direction key to lock, long press the start/stop key to unlock
  • Timing function: running time 0.1- 999 seconds/minutes/hours/day, intermittent time 0.1- 999 seconds/minutes/hours/day
  • Cycle: 0-999 times (0 is infinite cycle)
  • Suction return angle: 0-720 degrees
  • External control signal input: (1) start/stop: passive contact, external control input level (5-24V); (2) Forward/reverse: passive contact, external control input level (5-24V); (3) Speed adjustment: analog 0-5V, 0-10V, 4~20mA (optional)
  • Communication interface: RS485 MODBUS interface
  • Operating condition: Temperature 0-40°C; Relative humidity <80%
  • IP grade: IP31
  • Dimensions (L x W x H): 232 x 140 x 145 mm (9.1x 5.5 x 5.7 inch)
  • Weight: 2.9 kg (6.4lbs)
  • BT103S Applicable Pump Head and Tube, Flow Parameters
Drive  Pump head No. of channels Tubing size (mm) Flow rate (mL/min) per channel
BT103S        DG6-1 1 Wall 0.8-1, ID≤3.17 0.0002-49
DG10-1 1 Wall 0.8-1, ID≤3.17 0.0001-41
DG6-2 2 Wall 0.8-1, ID≤3.17 0.0002-49
DG10-2 2 Wall 0.8-1, ID≤3.17 0.0001-41
DG6-4 4 Wall 0.8-1, ID≤3.17 0.0002-49
DG10-4 4 Wall 0.8-1, ID≤3.17 0.0001-41
YZ15 1 13# 14# 19# 16# 25# 17# 18# 0.006-380
YT25 1 15# 24# 35# 36# 0.16-480

Click here to download the operating manual.
More Information
Flow Rate0.00011-480 mL/min
Max No. of Channels4 Channels
Max Speed100 rpm
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